NewsOrders & DealsPM Green Secures WBSEDCL's 250 MW/1,000 MWh Standalone BESS Auction Worth ₹31.26 BillionPM Green Secures WBSEDCL's 250 MW/1,000 MWh Standalone BESS Auction Worth ₹31.26 Billion
PM Green has won WBSEDCL's auction for 250 MW/1,000 MWh standalone BESS at Goaltore substation with ₹15.63 billion revenue projection. Including greenshoe capacity of additional 250 MW/1,000 MWh at Durgapur, total potential revenue reaches ₹31.26 billion. The 15-year agreement requires 90% round-trip efficiency and 18-month commissioning timeline.
*this image is generated using AI for illustrative purposes only.
PM Green, a wholly owned subsidiary of Hyderabad-based Power Mech Projects, has successfully secured West Bengal State Electricity Distribution Company's (WBSEDCL) auction for establishing standalone battery energy storage systems. The project represents a significant milestone in India's energy storage sector, with substantial revenue potential and technical specifications designed to enhance grid stability.
Project Specifications and Revenue Potential
The winning bid encompasses the development of 250 MW/1,000 MWh standalone battery energy storage systems at Goaltore substation in Paschim Midnapore. PM Green leads the consortium that secured this contract, with the tender having been issued in October of the previous year.
| Parameter: | Base Project | With Greenshoe Option |
|---|---|---|
| Capacity: | 250 MW/1,000 MWh | 500 MW/2,000 MWh |
| Location: | Goaltore substation | Goaltore + Durgapur |
| Revenue Projection: | ₹15.63 billion | ₹31.26 billion |
| USD Equivalent: | ~$173.55 million | ~$347.08 million |
The greenshoe capacity provides an additional 250 MW/1,000 MWh to be established at the Durgapur Projects campus, effectively doubling the total potential revenue to ₹31.26 billion.
Technical Requirements and Performance Standards
The BESS infrastructure must meet stringent technical specifications to ensure optimal performance and grid integration. The system requires interconnection with the WBSEDCL network at the 132 kV bus at Goaltore substation, utilizing only commercially established and operational technologies to minimize technology risks.
| Technical Specification: | Requirement |
|---|---|
| Round-trip Efficiency: | 90% AC-to-AC monthly |
| Commissioning Timeline: | 18 months from BESPA signing |
| Contract Duration: | 15 years from commissioning |
| Discharge Duration: | Minimum 4 hours at rated power |
| Readiness Time: | Maximum 1 hour between cycles |
| Daily Discharge Limit: | One full 4-hour cycle maximum |
Operational Parameters and Maintenance
The battery energy storage purchase agreement (BESPA) establishes comprehensive operational guidelines spanning 15 years from the scheduled commissioning date. PM Green can schedule planned maintenance outages with at least one month's advance notice, though total planned outage time cannot exceed 34 hours within any two-month period.
WBSEDCL retains operational flexibility for charging and discharging protocols, which can occur in single sessions or split across multiple sessions. The charging and discharging operations may be conducted at or below rated power based on WBSEDCL's requirements, with total daily energy discharge limited by the agreed round-trip efficiency of supplied charging energy.
Industry Context
India's energy storage sector experienced significant fluctuation in capacity additions during the first half of 2025. The country added 48.40 MWh of energy storage capacity, representing a 74% decline from the 186 MWh added during the same period in the previous year, according to India's Energy Storage Landscape 1H 2025 Report by Mercom India Research.
This project positions PM Green strategically within West Bengal's power infrastructure development, contributing to grid stability and renewable energy integration capabilities in the region.
Source: https://www.mercomindia.com/pm-green-wins-wbsedcl-1000-mwh-standalone-bess-auction
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